Boring machine



i N.ANDERS0N.

BORING MACHINE.

APPLlcATmN FILED )uw 2|,192|.

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iazaeie Nien stares PATENT ortie.

Nens ANDERSON, or rLiN'r, MICHIGAN.

BORING MACHINE.

Application led July 21,

To all w hom t may concern Be it known that I, NnLs ANDERSON, asubject. ofI the 'Iing of Sweden,y residing at Flint, inthe county of Genesee andL State of Michigamhave invented certain new and usefulImprovements in `llioring Machines, of which the following is a specification.

rThis'invention relates to boring machines, and it comprises a clamp or work holder, a shaft supportedin bearings, carried by said `worl-` holder, a threaded tool supporting member abit holder mounted therein, said bit holder. being threaded to engage the,

threads of the supporting member, and con.-

necting means between said shaft and saidy bit holder.

An object of the invention is the provision of a work holder, a drive shaft arranged substantially parallel to the work holder,xand a cutting tool arranged atright angles thereto and connected to the shaft.

A further object of the invention is the provision of a housing for the cutting tool which will project or withdraw the cutting tool when the cutting tool'is rotated.

A further object of the present invention is.. the provision of means operable by. the main shaft for clamping the workin the work holder.

In the accompanying drawings, l have shown oneembodinient of the invention. In

, shaft 17.

this showing:

Figure 1'is a side elevation,

`Figure 2 is asimilar view` of a portion of the mechanism on `an enlarged scale,

Figure?) is a detail perspective Viewv of a portion ofy the work holder,

Figure 4- is a central vertical sectionalr viewV through the tool housing and asso'.` c-iated parts, l f

Figure 5 is a view on line 5 5 of Figure 2,rv

rFigure `6 is a vertical sectional View ony linee- 6 of Figure et, t

Figure 7 is a detail perspective view of- Y a clamping element,

Figure 8 is a similar view of a portion of the control mechanism, and, y

Figure 9 is a similar view of another portion of; the: control mechanism,

Referringto the drawings, the reference numerals ,1 and 2 designate a pair'of beams adapted to form the work holder. Beam 2 is hollow and is adapted to receive an eX- tension member 3 having a handle 1 on one end.l Thebeams are connectedtoleach other detail transverse sectional- 1921. .Serial No; 486,641.

at their lowerends by means of a pair of hollowi shaft 10 passing through ay bearing.

11 in the beam 2 and provided with internal threads 12. A threaded rod 13 is mounted on apin 14 arranged in a slot 15 ofthe'beaml. The hollow shaft is provided with a bevel. gear 16 arranged on the oppositey end. The mainy shaft 17 is supn ported inrbearingslS, carriedby the beam 2. As shown, .the shaft is square in cross section except at the points where it is passed through the bearings and is adapted to besurrounded'by a hollow shaft 19 having'a squared opening wherebythe shaft 19 is slidably mounted on the shaft 17 and adapted to turn therewith; rr.The shaft 19 is provided with a bevel gear20,meshing with the gear 16 and` is further providedy withl a bevel gear r21 arranged .on its upper end. The gear 21 is adapted to mesh with a bevel gear22 mounted on a shaft 23 within a housing 21. The gears'20andf21 are spaced on thershaft 19 so, that only one ofy them can beV mesh with, its corresponding gear at one time.v The gears are moved into and outof mesh by 'sliding the shaft 19. on the The gearsxarelocked in the desired position by means` of a locking mechanism shownin Figures 8 and 9 of thezdrawings. As shown,.av pair offplates 25 are'secured` to the beamy 2 4and spaced from each other. A. plate26; is arranged between these plates, theplate 26 being provided with a pair o-fgrooves 27 :and 28. A collar 29 is secured to the shaftf1`9, andzthis collar is therefrom; A locking dog 34 yis pivotally mounted in a pair ofV ears 35, carriedby the beam 2, and this` dog is provided with a pair ofv arms 36 having slots 37 arrangedk on their outer ends adapted to receive the pins The inner ends of the arms 32of the slidable member yare adapted to enter thek groove 28.

The housing 2eeXtends, at substantially right angles; to the beams 1 and2 and is adaptecplgtol form,v a support` for the cutting tool. As shown, the shaft 23ris provided with a gear 38, adapted to mesh with a ring gear 39 carried by a tube 40. The tube eX- tends from the outer end ofthe casing to a point intermediate its ends and is provided with a tongue and groove fitting il connecting it to a tube 4-2. rlhe tube 40 is adapted to revolve by the revolution of the ring; gear while the tube i2 is rigidly mounted in the housing. YThe tube Zi2 isprovided withinternal threads i3 adapted to mesh with eX- ternal threads formed on a tool supporting member 44. The tool supportingy member entends into the revolving tube i0 andv is provided with grooves adapted to 4receive lugs carried by the revolving tube. A block i6 is arranged within the tool supporting member and is adapted to receive a cutting bit 47. As shown, the outer end of the tube i0 is provided with a threaded capv 48 to permit access to the interior.

rihe beams l and 2 are provided with openings in alinement with theV cutting tool and a pair of clamping elements 49 and 50.

are arranged over these openings. rThe clamping element is provided with a flange 5l extendinginto the opening `.in the beam l, and is further provided with teeth 52 formed on its face and adapted to engage the work. The clamp 50 is similarly provided with teeth 53. i

The lower end of the shaft 17 `is shaped to fit a brace 54, as shown at 55.

The operation of the device is as follows:

rlhe appliance is used` for boring holes in beams and similar work and is especially adapted for use in electric wiring. It insures a hole cut straight through thezmaterial worked on and can be swung to various positions about the airis of the cutting tool for convenience .in operation. The beam or other piece of worlr to be cut is arranged between the supporting beams l and 2 and gears 16 and 2O are brought into mesh with each other by arranging the ends of arms 32 in the lowergroove The gears 2l and 22 are then out of mesh so that the cutting tool will not be operated. kBy turning the shaft, the rod 18 is fed into the hollow shaft 10, drawing the beams toward each other. 'The sleeve 7 is turned tol tighten the lower end of the beams and the work is clamped between the clamps 49 and 50.

lWhen the work has been properly positioned,

the dog 34 is swung on its pivot to move the slidable member outwardly and disengage it from the groove 2S. The shaft is then moved upwardly and the arms 32 seated in groove 27. A spring 56 may be secured to the dog for the purpose of automatically returning the parts to locked position. 1When the shaft is moved upwardly, gears 21 and s e ro 'nto mesi an revo u ion o 22 ar b ught 1 t l d l t f the handle revolves the shaft 23 and the gear 3S. The revolving tube .i0 is thus revolved through the ring gear 39 and the tool holder le revolves therewith. The revolution of the tool holder causes the tool to be projected or withdrawn due to the threads formed thereon engaging the threads 43 of the stationary tube 4:2.

lit is to vbe understood that the form of my invention herewith s hown and described is to be taken as a preferred example of the same, and that various changes inthe shape, size, and arrangement of parts may be resorted to without 4departing from the spirit of the invention or the scope of the subjoined claims. v

Having thus described my invention.7 l claim:

l. A boring device comprising a clamping element, formed of a pair of spaced members, a` drive shaft supported by one of said members, disengageable means driven by said shaft to move said members toward and away from each other, a boring tool mounted at an angle to said members, and disengageable connecting means between said tool and said shaft to drive said tool.

2. A boring device comprising a clamping element formed of two spaced members, a main shaft supported on one of said members, a hollow shaft having internal threads carried by one of said members, a threaded rod secured to the other member and adapted to engage the threads of said shaft, disengageable gearing connectingsaid hollow shaft to said main shaft, a boring tool arranged at an angle to said clamping element, and disengageable gearinoconnecting said boring tool to said mai siaft to drive said tool.

3. A boring device comprising a clamping between the hollow shaft and the main shaft.

being out of mesh when the gearing between the main shaft and the tool isV in mesh, and locking means to retain the gearing in either position. li. A boring device comprising a clamping element formed of two spaced members, a shaft supported on one of said members, a

sleeve slidable on said shaft and adapted to rotate therewith, a pair of bevel gears carried by said sleeve, a boring tool supported by said clamping element, operating means including a bevel pinion adapted to mesh with one of said gears for moving the spaced members of said clamping element toward and away from each other, operating means including a bevel pinion adapted to mesh with theother of said gears for rotating said boring tool, and means for shifting' said sleeve to selectively engage said gears with their corresponding pinions.

5. A boring device comprising a clamping element formed of two spaced members, a shaft supported by one of said members, a sleeve slidable on said shaft and rotatable therewith, a pair of bevel gears carried by said sleeve, a hollow shaft having internal threads carried by one of said members, a threaded rod secured to the other` member and adapted to engage the threads of said shaft, a bevel pinion secured to said holgears, means for shifting said sleeve to selectively engage said gears with their corresponding pinions, andl means for retaining said sleeve in either position.

ln testimony whereof I ax my signature in presence of two witnesses.

NELb ANDERSON.

f Witnesses PAUL V. GADOLA, GUNNARD E. PEARsoN. 

